Abstract: A polyester is provided, which is formed by copolymerizing (a) diacid or diester and (b) diol, wherein (a) diacid or diester includes (a1) and (a2) or a combination thereof, and each of R1 is independently H or C1-10 alkyl group, wherein (b) diol includes (b1) 1,6-hexanediol and (b2) 2,2,4,4-tetramethyl-1,3-cyclobutanediol, 1,4-cyclohexane dimethanol, tricyclo[5.2.1.0(2,6)]decanedimethanol, or a combination thereof, and (b1) 1,6-hexanediol and (b2) 2,2,4,4-tetramethyl-1,3-cyclobutanediol, 1,4-cyclohexane dimethanol, tricyclo[5.2.1.0(2,6)]decanedimethanol, or a combination thereof have a molar ratio (b1/b2) of 75:25 to 92:8.

Abstract: A polycarbonate diol is provided. The polycarbonate diol includes repeating units represented by formula (A) and formula (B), and hydroxyl groups located at both ends of the polycarbonate diol. The molar ratio of formula (A) to formula (B) is in a range from 1:99 to 99:1. R1 is a linear, branched or cyclic C2-20 alkylene group. R2 is a linear or branched C2-10 alkylene group; m and n are independently and can be an integer from 0 to 10, and m+n?1. A is a C2-20 alicyclic hydrocarbon, aromatic ring or a structure represented by formula (C). R3 and R4 are independently and can be a hydrogen atom or a C1-6 alkyl group; S is 0 or 1; and Z is selected from R5 and R6 are independently and can be a hydrogen atom or a C1-12 hydrocarbon group.

Abstract: Catalyst for hydrogenation of 1,3-cyclobutanediketone compound is provided, which includes a support and VIIIB group transition metal loaded thereon. The support includes a first oxide powder with a surface wrapped by a second oxide. The first oxide includes silicon oxide, aluminum oxide, zirconium oxide, titanium oxide, zinc oxide, or a combination thereof. The second oxide has a composition of MxAl(1-x)O(3-x)/2, M is alkaline earth metal, and x is from 0.3 to 0.7.

Abstract: A catalyst is provided. The catalyst includes a carrier and a metal. The carrier is represented by a formula: MxAl(1-x)O(3-x)/2, where M is an alkaline earth metal, and x is between 0.09 and 0.24. The metal is loaded on the carrier. A method for manufacturing the catalyst is also provided.

Abstract: Catalyst for hydrogenation of 1,3-cyclobutanediketone compound is provided, which includes a support and VIIIB group transition metal loaded thereon. The support includes a first oxide powder with a surface wrapped by a second oxide. The first oxide includes silicon oxide, aluminum oxide, zirconium oxide, titanium oxide, zinc oxide, or a combination thereof. The second oxide has a composition of MxAl(1-x)O(3-x)/2, M is alkaline earth metal, and x is from 0.3 to 0.7.

Abstract: A catalyst is provided. The catalyst includes a carrier and a metal. The carrier is represented by a formula: MxAl(1-x)O(3-x)/2, where M is an alkaline earth metal, and x is between 0.09 and 0.24. The metal is loaded on the carrier. A method for manufacturing the catalyst is also provided.

Abstract: A catalyst is provided. The catalyst includes a carrier and a metal Pd. The carrier is represented by a formula: MxAl(1?x)O(3?x)/2, where M is an alkaline earth metal, and x is between 0.09 and 0.24. The metal Pd is loaded on the carrier. A method for manufacturing the catalyst and a method for manufacturing a hydrogenated bisphenol A or derivatives thereof using the catalyst are also provided.

Abstract: Disclosed is a catalyst for hydrogenation of 4,4?-methylenedianiline (MDA), including a support, a magnesium-aluminum oxide layer covering the support, and a rhodium-ruthenium active layer loaded on the magnesium-aluminum oxide layer, wherein the rhodium and the ruthenium of the rhodium-ruthenium active layer have a weight ratio of 40:60 to 10:90. The hydrogenation catalyst can be collocated with hydrogen for hydrogenation of the MDA to form bis(para-amino cyclohexyl) methane (PACM), and the PACM contains 0 mol % to 25 mol % of (t,t)-isomer.

Abstract: A catalyst is provided. The catalyst includes a carrier and a metal Pd. The carrier is represented by a formula: MxAl(1-x)O(3-x)/2, where M is an alkaline earth metal, and x is between 0.09 and 0.24. The metal Pd is loaded on the carrier. A method for manufacturing the catalyst and a method for manufacturing a hydrogenated bisphenol A or derivatives thereof using the catalyst are also provided.

Abstract: Disclosed is a catalyst for hydrogenation of 4,4?-methylenedianiline (MDA), including a support, a magnesium-aluminum oxide layer covering the support, and a rhodium-ruthenium active layer loaded on the magnesium-aluminum oxide layer, wherein the rhodium and the ruthenium of the rhodium-ruthenium active layer have a weight ratio of 40:60 to 10:90. The hydrogenation catalyst can be collocated with hydrogen for hydrogenation of the MDA to form bis(para-amino cyclohexyl) methane (PACM), and the PACM contains O mol % to 25 mol % of (t,t)-isomer.

Abstract: The present invention provides a methanation catalyst prepared by depositing Pt and Ru on a metal oxide carrier by incipient wetness impregnation or precipitation deposition, drying and calcining the deposited carrier to obtain a Pt—Ru/metal oxide catalyst. This catalyst can selectively catalyze methanation of CO, wherein hydrogen and CO in a hydrogen-rich reformate or synthesis gas are reacted to form methane and water, thereby the CO concentration in the hydrogen-rich reformate is reduced.

Abstract: The present invention relates to a method for manufacturing carbonaceous nanofibers. The method comprises the following steps: (a) a liquid feed, a carrier gas and a de-coke agent are added into a reactor thereby to form a mixture, wherein the liquid feed includes a hydrocarbon, a catalyst precursor and a sulfide, and the carrier gas includes hydrogen; and (b) the mixture is heated at a temperature ranging from 700 to 1600° C. In this method, the hydrocarbon is used as a carbon source for the carbon material, which forms the carbonaceous nanofibers, a transition metal compound is used as a catalyst precursor, a sulfide is used as an auxiliary catalyst, and water or alcohol is used as a de-coke agent.

Abstract: The present invention provides a methanation catalyst prepared by depositing Pt and Ru on a metal oxide carrier by incipient wetness impregnation or precipitation deposition, drying and calcining the deposited carrier to obtain a Pt—Ru/metal oxide catalyst. This catalyst can selectively catalyze methanation of CO, wherein hydrogen and CO in a hydrogen-rich reformate or synthesis gas are reacted to form methane and water, thereby the CO concentration in the hydrogen-rich reformate is reduced.

Abstract: The present invention provides a catalyst for the methanol autothermal reforming reaction, which includes a mixed oxide of cerium and zirconium as a carrier, and Pt deposited on the carrier. The catalyst of the present invention can catalyze a feed containing methanol, water vapor and air undergoing the autothermal reforming reaction to form a hydrogen-rich reformate gas containing hydrogen, CO and CO2.

Abstract: The present invention discloses a catalyst useful in converting carbon monoxide and water to hydrogen and carbon dioxide (water gas shift reaction), which includes a metal oxide carrier and 0.1-10% Pt and 0-5% Re supported on the carrier, based on the weight of the carrier. The carrier contains copper oxide, alumina, and a metal oxide selected from zinc oxide, chromium oxide and magnesium oxide. The present invention also discloses a method for reducing the content of carbon monoxide in a hydrogen-rich reformate gas.

Abstract: A method for producing maleimides. The method comprises reacting maleic anhydride and a primary amine at 100-180° C. in an organic solvent using a solid acidic catalyst, and purifying the maleimide produced therefrom by extraction and crystallization. The molar ratio of the primary amine to maleic anhydride is about 0.8-1.6. With the present invention, high production yield with high purity of maleimides can be achieved. In addition, the solid acidic catalyst can be easily separated and recycled for subsequent use. Thus, the present invention provides a number of distinct advantages, including substantially improved yield, conveniently reusable catalyst, reduced waste disposal and lower costs.

Abstract: The present invention discloses a catalyst useful in selective oxidation of carbon monoxide (CO) contained in a hydrogen-rich reformate gas. The catalyst is a zeolite carrying Pt, Ru or alloys thereof. Pt or Ru is deposited on the zeolite by incipient wetness impregnation with an aqueous solution. The reformate gas having a reduced CO concentration can be introduced to a fuel cell as a fuel.

Abstract: A method for producing maleimides. The method comprises reacting maleic anhydride and a primary amine at 100-180° C. in an organic solvent using a solid acidic catalyst, and purifying the maleimide produced therefrom by extraction and crystallization. The molar ratio of the primary amine to maleic anhydride is about 0.8-1.6. With the present invention, high production yield with high purity of maleimides can be achieved. In addition, the solid acidic catalyst can be easily separated and recycled for subsequent use. Thus, the present invention provides a number of distinct advantages, including substantially improved yield, conveniently reusable catalyst, reduced waste disposal and lower costs.